Waist-Hip Ratio

腰臀比
  • 文章类型: Journal Article
    背景:吸烟等危险因素,辐射,慢性感染和接触职业化学物质与膀胱癌的发生密切相关。体重增加与膀胱癌之间的关联一直存在争议。这项病例对照研究的目的是评估希腊人群中人体测量学特征与膀胱癌发病率的关系。
    方法:这项病例对照研究是在希腊的一家三级医院进行的,病例是在过去2年内诊断出的膀胱癌患者,而对照患者因癌症以外的原因入院,与膀胱癌相关的常见危险因素无关。人体测量特征,如体重,高度,身体质量指数,测量腰围和臀围。用R(维也纳,奥地利)。
    结果:组间比较显示,膀胱癌患者的体重更高,与对照组相比,BMI和腰围。然而,多变量,二项逻辑回归显示,只有年龄(OR1.03,95%CI:1-1.05,p=0.02),不吸烟(OR0.12,95%CI:0.07-0.23,p<0.001)和与膀胱癌相关的职业(OR7.45,95%CI:2.53-27.93,p<0.001)显着预测膀胱癌的发生率。
    结论:膀胱癌发病率与特定的危险因素密切相关,如吸烟,接触化学品和烟雾的职业,年龄越来越大,辐射和慢性感染。一些研究表明,人体测量特征与膀胱癌之间存在弱关联,尽管大多数欧洲人群的研究都未证实这些发现.同样,在我们对希腊人口的病例对照研究中,我们发现体重/BMI和腰围增加与膀胱癌之间的潜在关系,但这种关联在多变量分析中消失了。
    Risk factors like smoking, radiation, chronic infections and exposure to occupational chemicals are strongly associated with occurrence of bladder cancer. Association between increased body weight and bladder cancer has been controversial. The aim of this case-control study is to evaluate association of anthropometric characteristics on bladder cancer incidence in Greek population.
    This case-control study was conducted at a tertiary hospital in Greece with cases being patients with bladder cancer diagnosed within the last 2 years and controls patients admitted to hospital for reason other than cancer and not related to common risk factors related to bladder cancer. Anthropometric characteristics like weight, height, body mass index, waist and hip circumference were measured. Analyses was done with R (Vienna, Austria).
    Comparison between groups showed that patients with bladder cancer had higher weight, BMI and waist circumference compared to controls. However, multivariate, binomial logistic regression showed that only age (OR 1.03, 95% CI: 1-1.05, p = 0.02), no use of smoke (OR 0.12, 95% CI: 0.07-0.23, p < 0.001) and occupation related to bladder cancer (OR 7.45, 95% CI: 2.53-27.93, p < 0.001) significantly predicted the incidence of bladder cancer.
    Bladder cancer incidence is strongly linked with specific risk factors such as smoking, occupation with exposure to chemicals and smoke, increasing age, radiation and chronic infections. Several studies have shown a weak association between anthropometric characteristics and bladder cancer, although most studies in European populations did not confirm these findings. Similarly in our case-control study in a Greek population, we found potential relationship between increased weight/BMI and waist circumference with bladder cancer, but the association disappeared in multivariate analysis.
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  • 文章类型: Journal Article
    The most common multifactorial endocrine disorder in females of reproductive age is polycystic ovary syndrome (PCOS), affecting about 5-10% of females worldwide and 9.3% of females in India. Androgen excess in PCOS is caused as a result of defects in steroidogenesis genes. CYP11A1 is an imperative marker in the steroid synthesis pathway, and the altered expression of CYP11A1 has been reported to disrupt the synthesis of steroids and hence conferring risk for the development of PCOS. The present study aimed to analyze genetic variants (rs11632698, rs4077582, rs4887139) of CYP11A1 with PCOS from North India. The study included 270 PCOS females diagnosed according to Rotterdam 2003 criteria and 270 age-matched healthy non-PCOS females. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used for the genotypic analysis of the selected genetic variants. Association analysis of biochemical parameters (cholesterol, triglyceride, high-density lipoprotein) and anthropometric measurements with PCOS cases was done. The genetic variants of CYP11A1 (rs11632698, rs4077582, and rs4887139) demonstrated significant association with PCOS cases (p=1.0E-12, p=3.0E-3, p=1.0E-2, respectively). Binary logistic regression revealed that the dominant model of rs11632698 conferred 2.0 risk, and dominant as well as the co-dominant model of rs4887139 conferred risk of 2.2 and 2.4 fold, respectively, towards the progression of PCOS. The overall mean triglyceride levels were elevated, and mean HDL levels were lower in PCOS cases as compared to threshold values. The significant association of studied genetic variants suggested the important role of CYP11A1 in susceptibility to PCOS. The study was the first of its kind from our region and provided baseline data of genetics of PCOS.
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  • 文章类型: Journal Article
    全球范围内,冠状动脉疾病(CAD)仍然是死亡的主要原因之一,发达国家和包括孟加拉国在内的欠发达国家(LEDC)。饮食在动脉粥样硬化和冠状动脉疾病(CAD)的发病过程中起着关键作用。这项研究的目的是评估患有CAD的心脏病病例与匹配对照的饮食习惯。
    遵守赫尔辛基的道德规范,经书面同意,这项病例对照研究是在210名受试者中进行的:105名CAD住院患者(选自LabAid心脏和专科医院)和105名来自当地城市社区的健康受试者,他们的体重指数(BMI:≥18.5和27社会人口统计学状况,详细的饮食模式和血压水平被记录,测量人体测量指数,和血清生物化学(完整的脂质分布)测试/分析的病例和对照。在SPS/WindowsV.21.0上使用适当的统计工具(t检验/条件逻辑回归)分析所有视觉重新检查的数据。
    几乎一半(45%)的CAD患者有高甘油三酯血症和较高水平的低密度脂蛋白,BMA显著升高(p=0.001),腰围,男性患者的腰臀比(分别为p=0.005和p=0.020)高于同龄人对照组。血脂谱,糖浓度,CAD患者的血压水平显示高于临床定义的临界值,这是CAD的既定危险因素。作为食用垃圾食品的危险因素的赔率(CI95%){OR=5.49(2.25-13.38)},鸡{OR=4.54(1.89-10.9)最多,其次是牛肉{OR=2.68(1.19-4.98)},鸡蛋{OR=2.38(1.14-10.92)},fish{OR=2.81(1.31-6.04)},和蔬菜{0R=.968(0.510-1.839)}。然而,无脂牛奶,酥油/黄油,凝乳/酸奶,水果的ORs较低,没有或有较小的CAD风险。
    CAD患者的饮食习惯(具有较高的BMI水平和血液生化指标)统计显示,食用垃圾食品,肉,鸡蛋风险更大,水果,无脂牛奶,酸奶,蔬菜遗骸对CAD有保护作用。
    Globally, coronary artery disease (CAD) remains one of the leading causes of death, both in developed and less economically developed countries (LEDC) including Bangladesh. Diet plays a key role in the pathogenesis processes of atherosclerosis and coronary artery disease (CAD). The purpose of this study was to assess the dietary habit of heart disease cases that had CAD against matched controls.
    Complying Helsinki ethical norms, with written consent, this case-control study was performed among 210 subjects: 105 CAD-hospitalized patients (selected from Lab Aid Cardiac and Specialized Hospitals) and 105 healthy subjects from local urban communities having their body mass index (BMI: ranging between ≥18.5 and 27 socio-demographic status, detailed-dietary patterns and blood pressure levels were recorded, anthropometric indices measured, and serum biochemistry (complete lipid profile) tested/analyzed for both the cases and controls. All visually re-checked data were analyzed using appropriate statistical tools (t test/conditional-logistic regressions) on SPS/Windows V.21.0.
    Almost half (45%) CAD patients had hypertriglyceridemia and higher levels of low-density lipoprotein, significantly higher BMA (p=0.001), waist circumference, and waist to hip ratio in male patients (p=0.005 and p=0.020, respectively) than their peer controls. Serum lipid profiles, sugar concentrations, and blood pressure levels of CAD patients revealed higher levels than clinically defined cut-off values as established risk factors for CAD. Odds ratios (CI 95%) as risk factors for consuming junk food {OR=5.49 (2.25-13.38)}, chicken {OR=4.54 (1.89-10.9) was the most, followed by beef {OR=2.68 (1.19-4.98)}, eggs {OR=2.38 (1.14-10.92)}, fish {OR=2.81 (1.31-6.04)}, and vegetables {0R=.968 (0.510-1.839)}. However, fat-free milk, ghee/butter oil, curd/yogurt, and fruits had lower ORs revealing no or less risks for CAD.
    Food habits of CAD patients (with higher BMI level and biochemical indicators of the blood) statistically revealed that consuming junk food, meat, and eggs being riskier, fruits, fat-free milk, yogurt, and vegetable remains have protective effects on CAD.
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  • 文章类型: Journal Article
    目的:肥胖患者常出现脂质代谢异常。除了血脂异常,预测心血管疾病风险的标志物之一是血浆致动脉粥样硬化指数(AIP),这与饮食摄入有关。健康脂肪质量指标可能会影响AIP。本研究的目的是寻找膳食脂肪质量之间的可能关系,和AIP以及肥胖和非肥胖志愿者之间这些指标的比较。
    方法:本研究是一项横断面描述性分析病例对照研究,纳入157名正常、超重和肥胖志愿者(n=71名正常、年龄:38.90±10.976vsn=86超重/肥胖,年龄:38.60±9.394),年龄范围为18-65岁。使用FFQ测量食物摄入量,人体测量指数(体重,高度,体重指数和腰臀比),身体成分(内脏脂肪水平,全身水,身体脂肪量),和脂质分布进行测量。
    结果:根据目前的结果,可比较的生化参数,包括TC(P=0.580),TG(P=0.362),与正常志愿者相比,超重/肥胖志愿者的LDL(P=0.687)和HDL(P=0.151)被发现。膳食脂肪质量的影响,包括动脉粥样硬化(AI)和血栓形成(TI)低/高胆固醇血症比(h/H),与正常组相比,超重/肥胖组的胆固醇饱和脂肪指数(CSI)显示显著较高的AI(P=0.012).然而,正常体重志愿者的h/H(P=0.034)和ω-6/ω-3比率(P=0.004)明显更高。AI之间存在正相关,TI,CSI,SFA,MUFA,两组PUFA和ω-6/ω-3比值与AIP呈负相关,h/H与AIP呈负相关。尽管这些相关性具有显着意义,但通过在正常和超重/肥胖组中进行多元回归,未观察到强相关性(R2=0.210,R2=0.387)。
    结论:总之,目前的工作提出了膳食脂肪质量之间的直接关系,BMI增加,和AIP的脂质异常。然而,需要进一步的大规模研究来维持这一愿望的明确结论。
    OBJECTIVE: Abnormalities in lipid metabolism are commonly observed in patients who were obese. Alongside dyslipidemia, one of the markers in predicting the risk of cardiovascular disease is the Atherogenic Index of Plasma (AIP), which is related to dietary intake. Healthy fat quality indices might affect on AIP. The purpose of this study is to find the possible relationship between dietary fat quality, and AIP and comparison of these indices among obese and non-obese volunteers.
    METHODS: This study was a cross-sectional descriptive-analytic case-control study with 157 normal and overweight and obese volunteers (n = 71 normal, Age: 38.90 ± 10.976 vs n = 86 overweight/obese, Age: 38.60 ± 9.394) in the age range of 18-65 years. Food intake was measured using FFQ, anthropometric indices (weight, height, body mass index and waist to hip ratio), body composition (visceral fat level, total body water, body fat mass), and lipid profile were measured.
    RESULTS: Based on the present results, comparable biochemical parameters including TC (P = 0.580), TG (P = 0.362), LDL (P = 0.687) and HDL (P = 0.151) among overweight/obese volunteers as compared to normal ones were noticed. Effects of dietary fat quality, including Atherogenicity (AI) and Thrombogenicity (TI) hypo/hypercholesterolemic ratio (h/H), the Cholesterol-Saturated Fat Index (CSI) showed significantly higher AI (P = 0.012) in the overweight/obese group as compared to the normal group. Whereas, h/H (P = 0.034) and ω-6/ω-3 ratio (P = 0.004) were significantly higher in normal-weight volunteers. There was a positive correlation between AI, TI, CSI, SFA, MUFA, PUFA and ω-6/ω-3 ratio with AIP and negative correlation between h/H with AIP in both groups. Despite the significances of these correlations no strong relation was observed by doing multiple regression among normal and overweight/obese groups (R2 = 0.210, R2 = 0.387).
    CONCLUSIONS: In summary, the present work proposes a direct relationship between dietary fat quality, increased BMI, and lipid abnormalities with AIP. Nevertheless, further large-scale studies are required to sustain a clear conclusion in this wish.
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  • 文章类型: Journal Article
    OBJECTIVE: General and central adiposity are associated with the risk of developing prostate cancer (PCa), but the role of these exposures on PCa survival among men of African ancestry are less studied. This study aimed to investigate the association of anthropometry at diagnosis with all-cause and PCa-specific mortality and evaluate whether androgen deprivation therapy (ADT) modulated this risk.
    METHODS: Associations between body mass index (BMI), waist circumference (WC), and waist-to-hip ratio (WHR) at diagnosis and mortality were examined in 242 men with newly diagnosed PCa enrolled between 2005 and 2007 and re-evaluated 10.9 years later. Multi-variable Cox proportional hazard models were used to examine associations of body size variables (using standard WHO cut-points and as continuous variables) with mortality, adjusted for sociodemographic characteristics, Gleason score, smoking, diabetes, primary treatment, and ADT therapy.
    RESULTS: A total of 139 deaths (all-cause mortality 6.98/100 person-years) occurred (PCa-specific deaths, 56; other causes, 66; causes unknown, 17). In multi-variable analysis BMI, WC and WHR categories at diagnosis were not associated with all-cause mortality even after adjusting for ADT. While WHR (but not BMI or WC) when included as a continuous variable predicted lower PCa-specific mortality (multi-variable adjusted WHR per 0.1 difference: HR, 0.50; 95%CI 0.28, 0.93), the effect disappeared with ADT covariance and excluding deaths within the first 2 years.
    CONCLUSIONS: Our study suggests that central adiposity as measured by WHR may improve long-term survival among men of African ancestry. Metabolic studies to understand the mechanism for this association are needed.
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  • 文章类型: Journal Article
    Cardiovascular disease (CVD) is the leading cause of death in women worldwide. The cardiovascular risk profile deteriorates after women enter menopause. By definition, women diagnosed with premature ovarian insufficiency (POI) experience menopause before 40 years of age, which may render these women even more susceptible to develop CVD later in life. However, prospective long-term follow up data of well phenotyped women with POI are scarce. In the current study we compare the CVD profile and risk of middle aged women previously diagnosed with POI, to a population based reference group matched for age and BMI.
    We compared 123 women (age 49.0 (± 4.3) years) and diagnosed with POI 8.1 (IQR: 6.8-9.6) years earlier, with 123 population controls (age 49.4 (± 3.9) years). All women underwent an extensive standardized cardiovascular screening. We assessed CVD risk factors including waist circumference, BMI, blood pressure, lipid profile, pulse wave velocity (PWV), and the prevalence of diabetes mellitus, metabolic syndrome (MetS) and carotid intima media thickness (cIMT), in both women with POI and controls. We calculated the 10-year CVD Framingham Risk Score (FRS) and the American Heart Association\'s suggested cardiovascular health score (CHS). Waist circumference (90.0 (IQR: 83.0-98.0) versus 80.7 (IQR: 75.1-86.8), p < 0.01), waist-to-hip ratio (0.90 (IQR: 0.85-0.93) versus 0.79 (IQR: 0.75-0.83), p < 0.01), systolic blood pressure (124 (IQR 112-135) versus 120 (IQR109-131), p < 0.04) and diastolic blood pressure (81 (IQR: 76-89) versus 78 (IQR: 71-86), p < 0.01), prevalence of hypertension (45 (37%) versus 21 (17%), p < 0.01) and MetS (19 (16%) versus 4 (3%), p < 0.01) were all significantly increased in women with POI compared to healthy controls. Other risk factors, however, such as lipids, glucose levels and prevalence of diabetes were similar comparing women with POI versus controls. The arterial stiffness assessed by PWV was also similar in both populations (8.1 (IQR: 7.1-9.4) versus 7.9 (IQR: 7.1-8.4), p = 0.21). In addition, cIMT was lower in women with POI compared to controls (550 μm (500-615) versus 684 μm (618-737), p < 0.01). The calculated 10-year CVD risk was 5.9% (IQR: 3.7-10.6) versus 6.0% (IQR: 3.9-9.0) (p = 0.31) and current CHS was 6.1 (1.9) versus 6.5 (1.6) (p = 0.07), respectively in POI versus controls.
    Middle age women with POI presented with more unfavorable cardiovascular risk factors (increased waist circumference and a higher prevalence of hypertension and MetS) compared to age and BMI matched population controls. In contrast, the current study reveals a lower cIMT and similar 10-year cardiovascular disease risk and cardiovascular health score. In summary, neither signs of premature atherosclerosis nor a worse cardiovascular disease risk or health score were observed among middle age women with POI compared to population controls. Longer-term follow-up studies of women of more advanced age are warranted to establish whether women with POI are truly at increased risk of developing CVD events later in life.
    ClinicalTrials.gov Identifier: NCT02616510.
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  • 文章类型: Journal Article
    To explore associated risk factors and their interactions with type 2 diabetes (T2DM) among the elderly with prediabetes in rural areas in China.A nested case-control study was conducted in a fixed cohort to identify the risk factors for T2DM among the elderly with prediabetes in rural areas of Yiyang City in China. A total of 37 elderly with T2DM were included in the cases group and 111 elderly subjects with prediabetes were matched in the control group. Data related to sociodemographic characteristics, lifestyle behavior, and anthropometric variables were collected by trained staff using standard tools. The risk factors for T2DM were determined using conditional logistic regression analysis, and their additive interactions were also explored.Multivariable conditional logistic regression analysis results showed that overweight/obesity (odds ratio [OR] = 4.80, 95% confidence interval [CI]: 1.20-12.28), family history of diabetes (OR = 3.63, 95% CI: 1.03-12.81), physically inactive (OR = 3.08, 95% CI: 1.14-8.30), high waist-to-hip ratio (WHR) (OR = 3.15, 95% CI: 1.27-7.80), and inadequate diabetes-specific health literacy (DSHL) (OR = 3.92, 95% CI: 1.14-13.48) increased the risk for T2DM. Additive interactions for T2DM were observed between a family history of diabetes and high WHR with a relative excess risk of interaction (RERI) of 10.02 (95% CI: 4.25, 15.78), and between high WHR and overweight or obesity, with an RERI of 3.90 (95% CI: 0.36, 7.44).The independent risk factors for T2DM are overweight or obesity, high WHR, family history of diabetes, physically inactive, and inadequate DSHL. High WHR as a risk factor for T2DM has additive interactions with family history of diabetes and overweight or obesity.
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  • 文章类型: Journal Article
    为了开发一种新的独立于性别的人体测量指数,称为角度指数,与2型糖尿病有关。
    病例控制。
    该研究包括121名参与者,分为两组。一组没有糖尿病,并作为对照组(n=50)。另一组患有2型糖尿病(n=71)。31%(n=37)的受试者是男性,69%(n=84)是女性。62%(n=75)的受试者是东印度裔,28%(n=34)是非洲种族,10%(n=12)是混合种族。
    这项研究的参与者来自特立尼达岛,位于加勒比海。研究中的患者是从医院记录中随机选择的。
    假设2型糖尿病患者的平均角度指数将高于无2型糖尿病患者的平均角度指数。
    2型糖尿病患者的角度指数值明显高于对照组(p<0.001)。与其他性别独立变量相比,角度指数是与2型糖尿病相关的优于性别独立的人体测量指数(曲线下面积=0.72;p<0.001)。角度指数与糖化血红蛋白(rs=0.28,p=0.003)和空腹血糖(rs=0.31,p=0.001)水平相关。与对照组相比,2型糖尿病患者的角度指数大于184°的可能性是对照组的四倍(OR4.2,95%CI1.8至9.9)。
    角度指数是区分2型糖尿病患者和非2型糖尿病患者的优越的性别独立指数,与腰围相比,腹部容积指数,锥度指数,血压读数,甘油三酯水平和极低密度脂蛋白水平。
    To develop a novel sex independent anthropometric index, termed as angle index, related to type 2 diabetes.
    Case-control.
    The study comprised 121 participants and were divided into two groups. One group had no form of diabetes and served as controls (n=50). The other group had the condition of type 2 diabetes (n=71). 31% (n=37) of the subjects were male and 69% (n=84) were female. 62% (n=75) of the subjects were of East Indian ethnicity, 28% (n=34) were of African ethnicity and 10% (n=12) were of mixed ethnicity.
    Participants of the study were from the island of Trinidad, located in the Caribbean. Patients in the study were selected at random from hospital records.
    It was hypothesised that the mean angle index of patients with type 2 diabetes would be higher than the mean angle index of patients without type 2 diabetes.
    Patients with type 2 diabetes had a significantly higher angle index value as compared with controls (p<0.001). Angle index was the superior sex independent anthropometric index in relation to type 2 diabetes (area under the curve=0.72; p<0.001) as compared with other sex independent variables. Angle index correlated with glycated haemoglobin (rs=0.28, p=0.003) and fasting blood glucose (rs=0.31, p=0.001) levels. Patients with type 2 diabetes were four times more likely to have an angle index greater than 184° (OR 4.2, 95% CI 1.8 to 9.9) as compared with controls.
    Angle index was a superior sex independent index for discriminating between patients with and without type 2 diabetes, as compared with waist circumference, abdominal volume index, conicity index, blood pressure readings, triglyceride levels and very low-density lipoprotein levels.
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  • 文章类型: Journal Article
    OBJECTIVE: The aim of this study was to explore the association between central obesity and lower urinary tract symptoms (LUTS) among men in southern China, and test the hypothesis that central obesity measured by the waist-to-hip ratio (WHR) is a predictor of the severity of LUTS.
    METHODS: In all, 4303 men from the Fangchenggang Area Male Healthy and Examination Survey (FAMHES) were included in this study. LUTS were assessed by the International Prostate Symptom Score (IPSS), whereas central obesity was evaluated by the WHR. The association between WHR and LUTS was tested using logistic and Cox regression analyses.
    RESULTS: After screening, 2917 participants were in the study. Univariate analysis indicated significant differences in WHR in the presence of LUTS (P = .012). After stratification by age, logistic regression indicated that LUTS were more frequent in 60-year-old men with a higher WHR (odds ratio [OR] 2.89, 95% confidence interval [CI] 1.21-6.89) compared with participants <40 years old. Cox regression analysis after pairing of 252 LUTS cases and 252 control subjects from the 2917 eligible participants according to age (±5 years), indicated that central obesity (WHR ≥0.9) may be significantly associated with moderate or severe LUTS (OR 1.95, 95% CI 1.16-3.26). The associations between central obesity and straining (OR 2.44, 95% CI 1.40-4.24) and weak stream (OR 2.37, 95% CI 1.27-4.45) were significant after multivariate adjustment.
    CONCLUSIONS: Males with central obesity are at increased risk of LUTS, and increased WHR is associated with worsened straining and weak stream. Further investigations are needed to confirm these associations.
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  • 文章类型: Journal Article
    背景:肥胖是癌症的危险因素。虽然它不会增加局部前列腺癌的风险,它增加了欧洲血统男性患侵袭性疾病的风险。很少有研究调查肥胖是非洲血统男性的前列腺癌危险因素。这些研究的结果是异质的,但一些人报道了过度肥胖与侵袭性疾病的关联。方法:我们检查了体重指数(BMI),腰围,在NCI-马里兰州前列腺癌病例对照研究中,非洲裔美国人(AA)和欧洲裔美国人(EA)男性的腰臀比与前列腺癌的比率包括798例发生前列腺癌的男性(402AA和496EA)和1,008例基于人群的对照(474AA和534EA)。BMI是自我报告。根据登记时的测量值计算腰围和腰臀比。结果:在AA男性中,高BMI在入学时或之前几年与前列腺癌风险降低有关。相比之下,BMI升高会增加EA男性的患病风险.在AA和EA男性中,腰围与前列腺癌呈负相关,而高腰臀比在AA男性中与前列腺癌无关,但在EA男性中倾向于与晚期/侵袭性疾病相关.结论:我们的发现揭示了本研究人群中AA男性的肥胖悖论,高BMI和腰围与疾病风险降低相关。影响:我们的观察扩展了肥胖如何影响AA中前列腺癌风险的知识。癌症流行病学生物标志物上一篇;27(8);936-44。©2018AACR。
    Background: Obesity is a cancer risk factor. Although it does not increase the risk of localized prostate cancer, it raises the risk of the aggressive disease in men of European ancestry. Few studies investigated obesity as a prostate cancer risk factor in men of African ancestry. Findings from those studies were heterogeneous, but some reported an association of excess body fatness with aggressive disease.Methods: We examined the relationship of body mass index (BMI), waist circumference, and waist-hip ratio with prostate cancer in African American (AA) and European American (EA) men in the NCI-Maryland Prostate Cancer Case-Control Study consisting of 798 men with incident prostate cancer (402 AA and 496 EA) and 1,008 population-based controls (474 AA and 534 EA). BMI was self-reported. Waist circumference and waist-hip ratio were calculated from measurements at enrollment.Results: A high BMI either at enrollment or years prior to it was associated with a decreased risk of prostate cancer in AA men. In contrast, an elevated BMI tended to increase the disease risk in EA men. Waist circumference was inversely associated with prostate cancer in both AA and EA men, whereas a high waist-hip ratio did not associate with prostate cancer in AA men but tended to be associated with advanced/aggressive disease in EA men.Conclusions: Our findings reveal an obesity paradox among AA men in this study population, where a high BMI and waist circumference associated with a decreased disease risk.Impact: Our observations expand the knowledge of how obesity may affect prostate cancer risks in AAs. Cancer Epidemiol Biomarkers Prev; 27(8); 936-44. ©2018 AACR.
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